feat: config map for configuration

needed for more complex configuration, i.e. tag-selections

Signed-off-by: Mårten Svantesson <[email protected]>

configs/helm/templates/configmap.yaml

@@ -0,0 +1,10 @@
+{{- with .Values.config }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "prometheus-rds-exporter.fullname" . }}
+  labels:
+    {{- include "prometheus-rds-exporter.labels" . | nindent 4 }}
+data:
+  prometheus-rds-exporter.yaml: | {{ toYaml . | nindent 4 }}
+{{- end }}

configs/helm/templates/deployment.yaml

@@ -63,6 +63,14 @@ spec:
               port: http
           resources:
             {{- toYaml .Values.resources | nindent 12 }}
+          {{- if .Values.config }}
+          args:
+          - --config
+          - /config/prometheus-rds-exporter.yaml
+          volumeMounts:
+            - mountPath: /config
+              name: config
+          {{- end }}
       {{- with .Values.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}
@@ -75,3 +83,10 @@ spec:
       tolerations:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- if .Values.config }}
+      volumes:
+        - name: config
+          configMap:
+            name: {{ include "prometheus-rds-exporter.fullname" . }}
+      {{- end }}
+

configs/helm/values.yaml

@@ -11,6 +11,9 @@ image:
 # Define environment variables
 env: {}
 
+# Configuration to generate
+config: {}
+
 # Name of the secret containing AWS credentials
 awsCredentialsSecret: ""
 

configs/prometheus-rds-exporter/prometheus-rds-exporter.yaml

@@ -58,3 +58,8 @@
 
 # Collect AWS RDS usages (AWS Cloudwatch API)
 # collect-usages: true
+
+# Select AWS instances by tags
+# tag-selections:
+#   Environment:
+#   - staging